Time-lapse infrared thermography system and method for damage detection in large-scale objects

Abstract

An infrared measurement system and method including taking multiple time lapse infrared images and visual images of a large-scale object over an extended period of time and analyzing such in order to better measure internal defects are described. Data collected over extended intervals of time are processed to provide measurements which are not affected by ambient conditions and the material properties of the object. The system may include infrared camera(s), visual (video) camera(s), external sensor(s), and an embedded computer.

Description

RELATED APPLICATIONS[0001]The present application claims benefit of U.S. Provisional Application Ser. No. 62 / 238,485 filed Oct. 7, 2015, which is incorporated herein by reference.FIELD OF INVENTION[0002]The invention is directed to a system and method involving a measurement and data processing system that may be positioned on or near an object, which is substantial in size, for an extended period of time and that takes time-lapse measurements of the object in order to detect internal defects in the object. The system uses infrared thermography to monitor how heat flows through objects over an extended period of time and also monitors the surrounding environmental conditions of the object. The system includes an infrared camera, a visual camera, an embedded computer and associated components, and an environmental data collection source, preferably external sensors. The system is left in-place for a period of time imaging one or more predetermined areas of the object periodically ove...

AI Technical Summary

Benefits of technology

The invention is a system and method that can accurately measure internal defects in large objects, such as concrete structures and military vessels, without needing to remove them from their place of use or operation. The system uses infrared thermography to collect data and measure the depth and rate of change of heat flow through the object, providing a more reliable and complete record of defects. This technology can help optimize maintenance and provide better documentation of the condition of objects and structures.

Problems solved by technology

Active thermography with a user supplied heat source is very difficult or impossible to provide for objects of substantial size.

It is not possible to adequately provide sufficient heat for a large object, such as a concrete bridge deck, an entire building, or the flight deck of an aircraft carrier.

Conventional infrared thermography may also require disruption to the operation of an object, e.g., closing of a bridge deck to traffic in order to take measurements.

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